My metrosexual fiance, who knows more about men’s fashion than I do, is uncertain but thinks you can do both. At the one formal wedding I’ve attended recently, the groom wore only a pocket square and his groomsmen wore neither bout nor pocket square.

I’ve read that you usually wear one or the other, not both together…it looks really busy. There was a link on a Martha Stewart thread at one point to “pocket bouts”…kind of an interesting, unique idea if you want to do something different:

It’s said that a pocket square is great for a suit or morning jacket (similar to what your wedding party will wear). I couldn’t find a good picture of a tie/bout/pocket square combo like what your guys might wear, only with a bowtie. I think the bout only or pocket square only looks clean.

I think when it is done like Sadie posted with a small bout it is most capable of putting them together. I personally see the pocket squares as a nice way to be different for the groom who hates flowers or has allergies.